US4064972A - Caliper brake for bicycles for maintaining equal distance between both brake shoes and a wheel therebetween - Google Patents

Caliper brake for bicycles for maintaining equal distance between both brake shoes and a wheel therebetween Download PDF

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Publication number
US4064972A
US4064972A US05/746,870 US74687076A US4064972A US 4064972 A US4064972 A US 4064972A US 74687076 A US74687076 A US 74687076A US 4064972 A US4064972 A US 4064972A
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US
United States
Prior art keywords
rocking arm
caliper
brake
bicycle
pivot shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US05/746,870
Other languages
English (en)
Inventor
Kiyoshi Ohtani
Kikuzo Takamiya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Cycle Co Ltd
Original Assignee
Bridgestone Cycle Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bridgestone Cycle Co Ltd filed Critical Bridgestone Cycle Co Ltd
Application granted granted Critical
Publication of US4064972A publication Critical patent/US4064972A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
    • B62L1/00—Brakes; Arrangements thereof
    • B62L1/02—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements
    • B62L1/06—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged
    • B62L1/10—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged by the elements moving substantially parallel to the wheel axis
    • B62L1/12—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged by the elements moving substantially parallel to the wheel axis the elements being mounted on levers pivotable about a common axis
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20582—Levers

Definitions

  • This invention relates to a caliper brake for a bicycle.
  • a bicycle is driven only by human power and the human power is substantially smaller than other power sources, so that even if a friction pad of the brake is kept in slight contact with a rotary part of such a light vehicle, the lightness, or low momentum, peculiar to the bicycle movement is considerably deteriorated.
  • a caliper brake for use in a bicycle comprises left and right caliper arms rotatably fitted to a pivot shaft and having at their ends brake shoes adapted to be urged against a rim of a wheel of the bicycle, a rocking arm having a base portion pivotally mounted to a frame of the bicycle between said caliper arms on said pivot shaft in a semi-fixed condition, and the rocking arm having at its end a through-hole, opposite to which the left and right caliper arms have bottomed holes, respectively, and a universal joint lever having at its middle portion a middle protrusive ball portion and at both its ends end protrusive ball portions, respectively, said middle protrusive ball portion fitting in said through-hole of the rocking arm and said end protrusive ball portions fitting in said bottomed holes of the left and right caliper arms, respectively, whereby the extent of the free gaps between the left and right brake shoes and the rim are maintained substantially equal
  • An object of the present invention is to provide an improved caliper brake for use in a bicycle so that the free gaps between the left and right brake shoes and the rim are always maintained equally.
  • FIG. 1 is a perspective view of a prior art caliper brake for a bicycle
  • FIG. 2 is an exploded perspective view of the caliper brake shown in FIG. 1;
  • FIG. 3a is a diagrammatic sketch illustrating normal prior art free gaps between the brake shoes and the rim
  • FIG. 3b is a diagrammatic sketch illustrating a condition in which one of the prior art brake shoes is in contact with the rim;
  • FIG. 4 is a perspective view of a caliper brake for a bicycle according to the present invention.
  • FIG. 5 is an exploded perspective view of the caliper brake as shown in FIG. 4;
  • FIG. 6 is a sectional view of the universal joint lever portion of the brake according to the invention when the brake is released;
  • FIG. 7 is a sectional view of the same universal joint lever portion during braking
  • FIG. 8a is a diagrammatic view illustrating a condition in which one of the brake shoes of the brake according to the present invention is in contact with the rim;
  • FIG. 8b is a sectional view of the universal joint lever portion of the brake corresponding to the condition illustrated in FIG. 8a;
  • FIG. 9a is a diagrammatic view illustrating a braking condition of the brake according to the invention.
  • FIG. 9b is a sectional view of the universal joint lever portion of the brake corresponding to the condition illustrated in FIG. 9a;
  • FIG. 10a is a diagrammatic view illustrating normal free gaps between the rim and the brake shoes of the brake according to the invention.
  • FIG. 10b is a sectional view of the universal joint lever portion of the brake corresponding to the condition illustrated in FIG. 10a.
  • a bicycle frame A has a front fork stem 1, a fork crown 2 and a front fork 3.
  • the fork crown 2 has at its middle portion a through-hole 2a through the middle portion from the front to the rear of the fork crown 2.
  • Reference numeral 4 denotes a base washer applied to the front of said through-hole 2a.
  • a reference numeral 5 denotes a pivot shaft for supporting caliper arms 8 and 11 which will be mentioned hereinafter.
  • the pivot shaft 5 has at its middle portion a collar 5a extending from the pivot shaft 5.
  • the collar 5a has a spring inserting slot 5b machined horizontally on the upper front side of the collar 5a.
  • the pivot shaft 5 also has at its rear end threads 5c and at its front end threads 5d.
  • the threads 5c of the pivot shaft 5 are threaded into a nut 6 through the base washer 4 and the through-hole 2a to fix the pivot shaft 5 to the frame A.
  • a middle portion of a return spring 7 Into the spring inserting slot 5b is inserted a middle portion of a return spring 7.
  • Reference numeral 8 denotes a right caliper arm having at its base portion an aperture 8a for inserting the pivot shaft 5 thereinto.
  • a right brake shoe 9 is attached to the end of the arm 8.
  • a wire guide 10 is attached to the middle portion of the arm 8.
  • Reference numeral 11 denotes a left caliper arm having at its pivotal position an aperture 11a for inserting the pivot shaft 5 thereinto.
  • a left brake shoe 12 is attached to the end of the arm 11.
  • Reference numeral 13 denotes a washer through which the threads 5d of the pivot shaft 5 fit and reference numeral 14 is a nut for the threads 5d.
  • the left caliper arm 11 has at its free end an aperture 11b into which a wire setting screw 15 is inserted.
  • Reference numeral 16 denotes a nut connected thereto.
  • reference numeral 17 denotes a rim of a wheel of a bicycle.
  • the present invention is intended to eliminate the disadvantages of the prior art caliper brake mentioned above.
  • FIGS. 4 - 10 An embodiment of the present invention will be explained hereinafter with reference to FIGS. 4 - 10, wherein the same reference numerals as those in FIGS. 1 - 3 denote like parts.
  • a locking arm coupler 18 is fastened to the frame A in a semi-fixed condition through the base washer 4, pivot shaft 5 and nut 6.
  • the locking arm coupler 18 has an integral ring-like base plate portion 18a to be inserted between the base washer 4 and the collar 5a of the pivot shaft 5, a small diameter cylinder portion 18b surrounding the collar 5a and a large diameter semi-cylinder portion 18c surrounding the boss portion of the right caliper arm 8. Further, a coil part 7a of the return spring 7 is fitted to the small diameter cylinder portion 18b of the coupler 18.
  • rocking arm 19 having at its base portion a hole 19a for inserting the pivot shaft 5, at its boss portion shoulders 19b extending outwardly, respectively, and at its end portion a through-hole 19c (preferably an elongated hole along the center line of the rocking arm).
  • the shoulders 19b of the rocking arm 19 are engaged with edges 18d of the semi-cylinder portion 18c of the coupler 18, respectively, without substantial gap.
  • the right caliper arm 8 and the left caliper arm 11 have bottom holes 8c and 11c, respectively, which are opposite to the through-hole 19c of the rocking arm 19.
  • a universal joint lever 20 having at its middle portion a middle protrusive ball portion 20a and at its both sides end protrusive ball portions 20b, respectively.
  • Said middle protrusive ball portion 20a is inserted into the through-hole 19c of the rocking arm 19.
  • Said end protrusive ball portions 20b are inserted into the bottomed holes 8c and 11c of the caliper arms 8 and 11, respectively.
  • a reference numeral 21 denotes an outer wire connected to the wire guide 10, 22 and inner wire secured by the set screw 15.
  • the distance between the brake shoe 9 and the rim 17 is equal to that between the brake shoe 12 and the rim, as shown in FIG. 10a.
  • the universal joint lever 20 resides in a condition as shown in FIG. 6. If a brake lever (not shown) of the bicycle is operated to pull the inner wire 22, then the right and left caliper arm 8 and 11 rotate in directions opposite to one another, so that the right and left brake shoes 9 and 12 are pushed against the respective sides of the rim 17, as shown in FIG. 9a and the braking is performed. Then, the universal joint lever 20 changes its condition from the condition shown in FIG. 6 to that in FIG.
  • rocking arm 19 does not change its position, since the rocking arm 19 is coupled to the frame A of the bicycle in a semi-fixed condition, i.e., it cannot move axially in the direction of the pivot shaft 5, being sandwiched between the caliper arms 8 and 11.
  • the caliper arms 8 and 11 shift equally in opposite directions with respect to the rocking arm 19, since the universal joint lever 20 has at its middle portion the ball portion 20a and the end ball portions 20b are equidistant from the middle ball portion 20a. Consequently, in a normal condition, the braking can always be applied equally at both sides of the rim 17.
  • the universal joint lever 20 works to change its condition from FIG. 8b to FIG. 9b.
  • the universal joint lever 20 rocks, as shown by an arrow C in FIG. 9b, around the ball portion 20b at the right side in FIG. 9b, as a supporting point.
  • the rocking arm 19 shifts by an amount equal to half of the shifting amount of the arm 8.
  • the rocking arm 19 is supported by the coupler 18 which is supported on the frame A in a semi-fixed condition by the collar 5a of the pivot shaft 5 and the base washer 4. The rocking arm 19 can be moved when a large force is applied thereto.
  • the caliper brake according to the present invention has a restoring operation and therefore is very advantageous.
  • the normal condition in which the distances of the free gaps are equal can be automatically restored.
  • the caliper brake for a bicycle according to the present invention is very simple in construction, comprising the rocking arm coupler, the rocking arm and the universal joint lever in addition to the conventional caliper brake, as mentioned above, so that it is very easy to manufacture the caliper brake according to the present invention.
  • the distance of the free gaps between the brake shoes and the rim can be always maintained equal, so that one-side braking can be prevented and reliable braking can be realized.
  • the present invention has an advantageous effect in that the ease of the bicycle riding can be maintained by eliminating dragging of the brake shoe during bicycle operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
US05/746,870 1976-07-12 1976-12-02 Caliper brake for bicycles for maintaining equal distance between both brake shoes and a wheel therebetween Expired - Lifetime US4064972A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JA51-81955 1976-07-12
JP8195576A JPS538944A (en) 1976-07-12 1976-07-12 Caliper brake for bicycle

Publications (1)

Publication Number Publication Date
US4064972A true US4064972A (en) 1977-12-27

Family

ID=13760912

Family Applications (1)

Application Number Title Priority Date Filing Date
US05/746,870 Expired - Lifetime US4064972A (en) 1976-07-12 1976-12-02 Caliper brake for bicycles for maintaining equal distance between both brake shoes and a wheel therebetween

Country Status (6)

Country Link
US (1) US4064972A (de)
JP (1) JPS538944A (de)
DE (1) DE2653846C3 (de)
FR (1) FR2358312A1 (de)
GB (1) GB1532300A (de)
IT (1) IT1065521B (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4263990A (en) * 1978-03-23 1981-04-28 Yoshigai Kikai Kinzoku Kabushiki Kaisha Caliper brake apparatus of the side-pull type
US4482033A (en) * 1981-09-03 1984-11-13 Yoshigai Kikai Kinzoku Kabushiki Kaisha Caliper brake apparatus of the side-pull type
EP0301696A1 (de) * 1987-07-20 1989-02-01 Masataro Sato Felgenbremse
WO1990009305A1 (en) * 1989-02-10 1990-08-23 Modolo Tecnologie Avanzate S.R.L. Device for obtaining the operating symmetry of a bicycle brake
EP0461465A1 (de) * 1990-06-13 1991-12-18 Look S.A. Vorrichtung zur Befestigung von aktiven und/oder passiven Elementen an der Wandung von Komposit-Bauteilen
US5435208A (en) * 1994-03-25 1995-07-25 Chen; Tse-Min Balancing structure of brake cables hoisting seat of bicycle
US5503252A (en) * 1995-05-11 1996-04-02 Gelbein; Mark Bicycle brake assembly
US6412605B2 (en) * 2000-02-24 2002-07-02 Campagnolo Srl Bicycle brake
US20040074704A1 (en) * 2002-10-07 2004-04-22 Ciamillo Theodore J. Cam assisted wheel brake
US20080181079A1 (en) * 2007-01-30 2008-07-31 Shu-Chi Hong Disk processing apparatus
CN111102308A (zh) * 2020-01-02 2020-05-05 中车青岛四方车辆研究所有限公司 自动对中装置、制动夹钳单元、极限报警方法及安装方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5851460Y2 (ja) * 1978-09-13 1983-11-24 吉貝機械金属株式会社 キヤリパ−ブレ−キのセンタ−調整装置
FR2456000A1 (en) * 1979-05-05 1980-12-05 Gipiemme Srl Bicycle brake rear supporting cross-member - has central cubical body with drilling for brake spindle
FR2502099A1 (fr) * 1981-03-23 1982-09-24 Batavus Intercycle Bv Frein de jante a commande par cable
FR2509683A1 (fr) * 1981-07-16 1983-01-21 Lauzier Rene Frein a tirage lateral, pour cycles et similaires
JPS5992084U (ja) * 1982-12-14 1984-06-22 吉貝機械金属株式会社 キヤリパブレ−キのセンタ調整装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH428468A (de) * 1965-05-07 1967-01-15 Weinmann Ag Felgenbremse und Verfahren zu deren Herstellung
GB1093809A (en) * 1966-09-21 1967-12-06 Weinmann Ag Improvements in central-pull brakes for bicycles, mopeds or the like
US3486586A (en) * 1967-12-22 1969-12-30 Joseph H Grier Jr Pedal crank actuated bicycle wheel rim brakes
US3628635A (en) * 1969-05-10 1971-12-21 Kiyokazu Yoshigai Bicycle brake

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH428468A (de) * 1965-05-07 1967-01-15 Weinmann Ag Felgenbremse und Verfahren zu deren Herstellung
GB1093809A (en) * 1966-09-21 1967-12-06 Weinmann Ag Improvements in central-pull brakes for bicycles, mopeds or the like
US3486586A (en) * 1967-12-22 1969-12-30 Joseph H Grier Jr Pedal crank actuated bicycle wheel rim brakes
US3628635A (en) * 1969-05-10 1971-12-21 Kiyokazu Yoshigai Bicycle brake

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4263990A (en) * 1978-03-23 1981-04-28 Yoshigai Kikai Kinzoku Kabushiki Kaisha Caliper brake apparatus of the side-pull type
US4482033A (en) * 1981-09-03 1984-11-13 Yoshigai Kikai Kinzoku Kabushiki Kaisha Caliper brake apparatus of the side-pull type
EP0301696A1 (de) * 1987-07-20 1989-02-01 Masataro Sato Felgenbremse
WO1990009305A1 (en) * 1989-02-10 1990-08-23 Modolo Tecnologie Avanzate S.R.L. Device for obtaining the operating symmetry of a bicycle brake
US5188200A (en) * 1989-02-10 1993-02-23 Modolo Technologie Avanzate S.R.L. Device for obtaining the operating symmetry of a bicycle brake
EP0461465A1 (de) * 1990-06-13 1991-12-18 Look S.A. Vorrichtung zur Befestigung von aktiven und/oder passiven Elementen an der Wandung von Komposit-Bauteilen
US5435208A (en) * 1994-03-25 1995-07-25 Chen; Tse-Min Balancing structure of brake cables hoisting seat of bicycle
US5503252A (en) * 1995-05-11 1996-04-02 Gelbein; Mark Bicycle brake assembly
US6412605B2 (en) * 2000-02-24 2002-07-02 Campagnolo Srl Bicycle brake
US20040074704A1 (en) * 2002-10-07 2004-04-22 Ciamillo Theodore J. Cam assisted wheel brake
US7000739B2 (en) * 2002-10-07 2006-02-21 Ciamillo Theodore J Cam assisted wheel brake
US20080181079A1 (en) * 2007-01-30 2008-07-31 Shu-Chi Hong Disk processing apparatus
CN111102308A (zh) * 2020-01-02 2020-05-05 中车青岛四方车辆研究所有限公司 自动对中装置、制动夹钳单元、极限报警方法及安装方法

Also Published As

Publication number Publication date
FR2358312A1 (fr) 1978-02-10
GB1532300A (en) 1978-11-15
DE2653846C3 (de) 1980-10-16
DE2653846A1 (de) 1978-01-19
JPS538944A (en) 1978-01-26
FR2358312B1 (de) 1980-04-04
JPS5541946B2 (de) 1980-10-27
DE2653846B2 (de) 1980-03-06
IT1065521B (it) 1985-02-25

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